Every hotel and restaurant in this state shall be properly lighted by day and by night, shall be properly plumbed and ventilated, and shall be conducted in every department with strict regard for the health, comfort and safety of its guests. Such proper plumbing and draining shall be done and maintained according to approved sanitary principles. Such proper ventilation shall be construed to require at least one door and one window in every sleeping room, which window shall permit easy access to the outside of the building, light well or court. No room shall be used as a sleeping room which does not open to the outside of the building or light wells, air shafts or courts.
